Back row seat backrest lock bolt storage structure based on clockwork spring
By combining the design of the spring and the cable mechanism, the problem of limited backrest tilt angle in the existing technology is solved, the locking bolt is effectively stored, and the space utilization and usage flexibility of the seat are improved.
Patent Information
- Application Number
- CN202520694958.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-04-14
AI Technical Summary
The existing rear seat backrest latch storage mechanism lacks a dedicated compensation mechanism, which limits the first backrest flip angle, affecting space utilization efficiency and usage flexibility.
The design employs a combination of a clock spring and a cable mechanism. The clock spring overcomes the elastic force of the return spring and compensates for the difference in cable length, ensuring that the locking bolt can still be stored even when flipped at a large angle. The elastic deformation of the clock spring compensates for the insufficient length of the cable mechanism.
It achieves effective storage of the locking bolt when the first backrest is flipped at a large angle, improving space utilization and usage flexibility, and ensuring the stability and reliability of the storage structure at different flipping angles.
Smart Images
Figure CN223812522U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile seat, especially relates to a back seat backrest lock bolt storage structure based on clock spring. BACKGROUND
[0002] With the continuous development of the automobile industry, consumers' requirements for the comfort and functionality of automobile seats are increasing. In the design of rear seat of an automobile, the folding function of the backrest is an important means to improve the space utilization rate and the multifunctionality of the seat. In order to realize the folding of the backrest, a lock bolt is usually provided on the backrest to cooperate with the backrest lock, and the state of the backrest is controlled by unlocking and locking. In the existing backrest structure of the rear seat, a first backrest and a second backrest are usually arranged side by side. The first backrest includes a fixed shaft and a first backrest rotatable about the fixed shaft, and the first backrest is provided with a backrest lock. A lock bolt rotatable is arranged on the second backrest at a position corresponding to the backrest lock, and the lock bolt can be locked horizontally in the backrest lock. When the backrest needs to be unlocked, the lock bolt is made to be separated from the backrest lock by operation, and at this time the backrest can be folded forward.
[0003] However, the existing backrest lock bolt storage mechanism of the rear seat has some deficiencies in design and application. The existing storage mechanism does not have a special compensation mechanism. In the process of unlocking the backrest lock and folding the backrest forward, due to the length limitation of the connecting structure such as the cable, the folding angle of the first backrest is greatly limited, and a larger folding angle cannot be realized, which to some extent affects the space utilization efficiency and the flexibility of use of the rear seat. For example, when the rear seat needs to be completely laid down to expand the trunk space, the limited folding angle may cause the seat to be unable to be completely laid flat, thereby affecting the storage capacity of the trunk; or when large items (such as bicycles, long-shaped items, etc.) need to be placed in the rear of the vehicle, due to the limited folding angle of the backrest, the items may not be placed smoothly, which brings inconvenience to the user. SUMMARY
[0004] In view of the problems existing in the prior art, the utility model aims to provide a backrest lock bolt storage structure of the rear seat based on a clock spring, which can compensate for the length difference of the cable mechanism, ensure that the cable mechanism can still have an effective downward pulling effect on the lock bolt when the first backrest is folded at a larger angle, realize the storage of the lock bolt, and avoid the limitation of the folding of the first backrest due to the insufficient length of the cable.
[0005] In order to achieve the above object, the utility model provides a backrest lock bolt storage structure based on clock spring of back row seat, including backrest pivot and side by side arrangement's first backrest and second backrest, the bottom of first backrest can be rotatably installed on the backrest pivot, is equipped with the backrest lock on the first backrest, the position corresponding backrest lock of second backrest is provided with rotatable lock bolt, the lock bolt is transversely locked in backrest lock, and is provided with reset spring between the lock bolt and second backrest, still include cable mechanism and clock spring, one end of cable mechanism is connected on the lock bolt, the other end is connected with clock spring after passing through the bottom of second backrest, clock spring is installed on the first backrest, and the elastic force that clock spring needs to overcome when the elastic deformation occurs is greater than the elastic force that reset spring needs to overcome when the elastic deformation occurs, when backrest lock is unlocked, and the first backrest is turned over to the front, clock spring can be turned over to the front along with the first backrest, thereby leading cable mechanism to pull down, and then pull the lock bolt to fold down to the storage state, at this time, the first backrest continues to turn over to the front, can pull clock spring to occur tensile deformation, to compensate the length difference of cable mechanism.
[0006] In the above scheme: the inner end of the clock spring is fixed to the first backrest through a clock spring rotating pin, and the clock spring is provided with a clock spring mounting shell, the outer end of the clock spring passes out of the clock spring mounting shell and is connected with the cable mechanism, and the clock spring mounting shell is also fixed to the first backrest. When the first backrest rotates, the clock spring rotating pin and the clock spring mounting shell can be synchronously rotated, which ensures that the clock spring can accurately and reliably compensate.
[0007] In the above scheme: the clock spring is fixed to the lower part of the side end of the first backrest and adjacent to the second backrest. This design makes full use of the space of the lower part of the side end of the first backrest, avoids setting additional compensation mechanisms in other key areas of the seat backrest, makes the internal structure of the entire seat backrest more compact, and is conducive to improving the design freedom and space utilization of the entire seat.
[0008] In the above scheme: the cable mechanism is designed with two cable fixed ends, one of which is fixed to the middle part of the second backrest, and the other is fixed to the bottom of the second backrest. This layout makes the cable mechanism better adapt to the structure of the seat backrest, effectively drives the lock bolt to fold down to the storage state when the first backrest is turned over to the front, and ensures the stability and reliability of the cable mechanism during the stress process.
[0009] In the above scheme: the second backrest is welded with a lock bolt mounting bracket, and the lock bolt is rotatably arranged on the lock bolt mounting bracket through a rotating shaft, which is simple in structure and convenient to install.
[0010] The reset spring is sleeved on the rotating shaft, one end of the reset spring is clamped on the lock bolt mounting bracket, and the other end of the reset spring is fixed on the lock bolt, so that the structure is simple and convenient to install.
[0011] In the above scheme: the flip angle of the lock bolt from the locking state to the storage state is 85°-95°, which not only ensures that the lock bolt can be completely stored, but also does not cause instability or inconvenience due to too large flip angle.
[0012] The utility model discloses the beneficial effect is: 1, through setting up the cable mechanism, the clockwork spring and reasonable connection mode, when the backrest lock is unlocked, the first backrest is forwardly overturned, the clockwork spring can overturn forwardly along with the first backrest, thereby leading the cable mechanism to pull down, and then pull the lock bolt and fold down to the storage state. In this process, if the first backrest continues to overturn forwardly, because the length of the cable is limited, the first backrest can pull the clockwork spring and stretch to compensate the length difference of the cable mechanism, ensure that the first backrest still can keep the effective pull-down effect of the cable mechanism to the lock bolt when overturning at a large angle, realize the storage of the lock bolt, and simultaneously avoid limiting the overturning of the first backrest due to the insufficient length of the cable. 2, the elastic force that the clockwork spring needs to overcome to occur elastic deformation is greater than the elastic force that the reset spring needs to overcome to occur elastic deformation, and this ingenious design plays a key role in the storage process of the lock bolt. On the one hand, it ensures that the reset spring will deform first when starting to perform the lock bolt storage action. This is because the elastic force of the reset spring is relatively small, and can produce deformation under the action of a small external force, thereby responding to the storage demand in time, making the lock bolt quickly and smoothly fold down to the storage state, and ensuring the timeliness of the lock bolt storage action. On the other hand, when the first backrest overturns at a small angle and the length of the cable mechanism is sufficient to meet the current state, the elastic force of the clockwork spring is relatively large, and the external force at this time is insufficient to cause the elastic deformation of the clockwork spring. In this way, unnecessary deformation of the clockwork spring can be effectively avoided under the condition of small-angle overturning, unnecessary energy loss is reduced, and the stability and reliability of the entire storage structure under different overturning angles are also ensured. 3, wide application range, high expansibility, and can be applied to various backrest unlocking and folding storage or ground lock folding storage. BRIEF DESCRIPTION OF DRAWINGS
[0013] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:
[0014] Figure 1 It is the schematic diagram of the lock bolt of the utility model in the locking position.
[0015] Figure 2 It is the schematic diagram of the lock bolt of the utility model in the storage position and the clockwork spring is not stretched.
[0016] Figure 3 is a schematic view of the lock bolt in the storage position and the stretched spring.
[0017] Figure 4 is Figure 1 a schematic view of the principle.
[0018] Figure 5 is Figure 2 and Figure 3 a schematic view of the principle. DETAILED DESCRIPTION
[0019] As shown in Figure 1 -5, a backrest lock bolt storage structure based on a clock spring mainly consists of a cable mechanism 6, a clock spring 7, a backrest rotating shaft, and a first backrest 1 and a second backrest 2 arranged side by side.
[0020] The bottom end of the first backrest 1 is rotatably installed on the backrest rotating shaft, the first backrest 1 is provided with a backrest lock 3, and the second backrest 2 is provided with a rotatable lock bolt 4 at a position corresponding to the backrest lock. The lock bolt 4 is transversely locked in the backrest lock 3, and a return spring 5 is arranged between the lock bolt 4 and the second backrest 2.
[0021] One end of the cable mechanism 6 is connected to the lock bolt 4, and the other end is connected to the clock spring 7 after passing through the bottom of the second backrest 3. The clock spring 7 is installed on the first backrest 1. The elastic force required to overcome the elastic deformation of the clock spring 7 is greater than the elastic force required to overcome the elastic deformation of the return spring 5.
[0022] When the backrest lock 3 is unlocked and the first backrest 1 is flipped forward, the clock spring 7 can be flipped forward with the first backrest 1, thereby pulling down the cable mechanism 6, and then pulling the lock bolt 4 to fold down to the storage state. At this time, the first backrest 1 continues to flip forward and can pull the clock spring 7 to stretch to compensate for the length difference of the cable mechanism 6.
[0023] Preferably, the inner end of the clock spring 7 is fixed to the first backrest 1 through a clock spring rotating pin 8, the clock spring 7 is provided with a clock spring installation shell 9, the outer end of the clock spring 7 penetrates out of the clock spring installation shell 9 and is connected to the cable mechanism 6, and the clock spring installation shell 9 is also fixed to the first backrest 1. The first backrest 1 can drive the clock spring rotating pin 8 and the clock spring installation shell 9 to rotate synchronously, which ensures that the clock spring 7 can accurately and reliably compensate.
[0024] Preferably, the clockwork spring 7 is fixed to the lower part of the side end of the first backrest 1 and adjacent to the second backrest 2. This design makes full use of the space of the lower part of the side end of the first backrest 1, avoids setting additional compensation mechanism in other key areas of the seat backrest, makes the internal structure of the whole seat backrest more compact, and is conducive to improving the overall design freedom and space utilization of the seat.
[0025] The cable mechanism 6 is designed with two cable fixing ends 61, one of which is fixed to the middle part of the second backrest 2, and the other is fixed to the bottom of the second backrest 2. This layout makes the cable mechanism 6 better adapt to the structure of the seat backrest, effectively drives the lock bolt 4 to fold down to the storage state when the first backrest 1 is flipped forward, and ensures the stability and reliability of the cable mechanism 6 during the force process.
[0026] Preferably, the second backrest 2 is welded with a lock bolt mounting bracket 11, and the lock bolt 2 is rotatably arranged on the lock bolt mounting bracket 11 through the rotating shaft 10, which is simple in structure and convenient to install.
[0027] Preferably, the reset spring 5 is sleeved on the rotating shaft 10, one end of which is clamped on the lock bolt mounting bracket 11, and the other end is fixed on the lock bolt 4, which is simple in structure and convenient to install.
[0028] Preferably, the folding angle of the lock bolt 4 from the locking state to the storage state is 85°-95°, which ensures that the lock bolt 4 can be completely stored, and also prevents the structure from being unstable or the operation from being inconvenient due to the too large folding angle.
Claims
1. A clockwork spring-based backrest backrest lock bolt storage structure, comprising a backrest rotating shaft and side-by-side arranged first backrest (1) and second backrest (2), the bottom end of the first backrest (1) is rotatably mounted on the backrest rotating shaft, a backrest lock (3) is arranged on the first backrest (1), a rotatable lock bolt (4) is arranged on the second backrest (2) corresponding to the position of the backrest lock, the lock bolt (4) is transversely locked in the backrest lock (3), and a reset spring (5) is arranged between the lock bolt (4) and the second backrest (2), characterized in that: Also comprising a cable mechanism (6) and a clock spring (7), one end of the cable mechanism (6) is connected to the lock bolt (4), the other end is connected to the clock spring (7) after winding through the bottom of the second backrest (2), the clock spring (7) is installed on the first backrest (1), the elastic force required to overcome the elastic deformation of the clock spring (7) is greater than the elastic force required to overcome the elastic deformation of the return spring (5); When the backrest lock (3) is unlocked, the first backrest (1) is turned forward, the clock spring (7) can be turned forward with the first backrest (1), thereby pulling down the cable mechanism (6), and then pulling the lock bolt (4) to fold down to the storage state; At this time, the first backrest (1) continues to turn forward, which can pull the clock spring (7) to stretch to compensate for the length difference of the cable mechanism (6).
2. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 1, characterized in that: The inner end of the clock spring (7) is fixed to the first backrest (1) through a clock spring rotating pin shaft (8), the clock spring (7) is provided with a clock spring installation shell (9), the outer end of the clock spring (7) penetrates out of the clock spring installation shell (9) and is connected with the cable mechanism (6), and the clock spring installation shell (9) is also fixed to the first backrest (1).
3. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 1, characterized by: The clock spring (7) is fixed to the side end of the first backrest (1) and adjacent to the second backrest (2).
4. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 1, characterized by: The cable mechanism (6) is designed with two cable fixed ends (61), one of which is fixed to the middle of the second backrest (2), and the other is fixed to the bottom of the second backrest (2).
5. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 1, characterized by: The second backrest (2) is welded with a lock bolt installation support (11), and the lock bolt (4) is rotatably arranged on the lock bolt installation support (11) through a rotating shaft (10).
6. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 5, characterized by: The return spring (5) is sleeved on the rotating shaft (10), one end is clamped on the lock bolt installation support (11), and the other end is fixed on the lock bolt (4).
7. The clockwork spring-based rear seat backrest lock rod storage structure according to claim 1, characterized by: The lock bolt (4) is folded down to the storage state from the locking state at an angle of 85°-95°.